/*  colormap handling code
 *
 *  Workspace window manager
 *  Copyright (c) 2015-2021 Sergii Stoian
 *
 *  Window Maker window manager
 *  Copyright (c) 1998-2003 Alfredo K. Kojima
 *
 *  This code slightly based on fvwm code,
 *  Copyright (c) Rob Nation and others but completely rewritten.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "WM.h"

#include "WM.h"
#include <X11/Xatom.h>

#include "window.h"
#include "framewin.h"
#include "colormap.h"

void wColormapInstallForWindow(WScreen* scr, WWindow* wwin)
{
  int i;
  XWindowAttributes attributes;
  int done = 0;
  Window xwin = None;

  if (wwin) {
    xwin = wwin->client_win;
  } else {
    xwin = scr->root_win;
  }

  scr->cmap_window = wwin;

  if (scr->root_colormap_install_count > 0) {
    scr->original_cmap_window = wwin;
    return;
  }

  /* install colormap for all windows of the client */
  if (wwin && wwin->cmap_window_no > 0 && wwin->cmap_windows) {
    for (i = wwin->cmap_window_no - 1; i >= 0; i--) {
      Window w;

      w = wwin->cmap_windows[i];
      if (w == wwin->client_win)
        done = 1;

      XGetWindowAttributes(dpy, w, &attributes);
      if (attributes.colormap == None)
        attributes.colormap = scr->colormap;

      if (scr->current_colormap != attributes.colormap) {
        scr->current_colormap = attributes.colormap;
        /*
         * ICCCM 2.0: some client requested permission
         * to install colormaps by itself and we granted.
         * So, we can't install any colormaps.
         */
        if (!scr->flags.colormap_stuff_blocked)
          XInstallColormap(dpy, attributes.colormap);
      }
    }
  }

  if (!done) {
    attributes.colormap = None;
    if (xwin != None)
      XGetWindowAttributes(dpy, xwin, &attributes);
    if (attributes.colormap == None)
      attributes.colormap = scr->colormap;

    if (scr->current_colormap != attributes.colormap) {
      scr->current_colormap = attributes.colormap;
      if (!scr->flags.colormap_stuff_blocked)
        XInstallColormap(dpy, attributes.colormap);
    }
  }
  XSync(dpy, False);
}

void wColormapAllowClientInstallation(WScreen* scr, Bool starting)
{
  scr->flags.colormap_stuff_blocked = starting;
  /*
   * Client stopped managing the colormap stuff. Restore the colormap
   * that would be installed if the client did not request colormap
   * stuff.
   */
  if (!starting) {
    XInstallColormap(dpy, scr->current_colormap);
    XSync(dpy, False);
  }
}
